ANSWER:

This is a big issue of dispute among scholars and the most authentic opinion is that the wives of the prophet salla Allahu alaihi wa sallam are from Ahlu Albait. 

There are authentic narrations that he said to Umm Salama: Yes, you are from my family.

QUESTION: According to Surah Al-Ahzab (33:33), the wives of Prophet Muhammad (PBUH) are included in the People of the House, however, according to the Hadith of the Cloak, it seems as if they are not. Are they included in the Ahl E Bayt or not?